Classification and terminology -- Debris flows in history -- Instability of steep slopes -- Mechanism of landslide-triggered debris flows: Liquefaction phenomena due to the undrained loading of torrent deposits -- Debris-flow mechanics -- Entrainment of material by debris flows -- Hyperconcentrated flow - transitional process between water flow and debris flow -- Subaqueous debris flows -- Volcanic debris flows -- Application of airborne and spaceborne remote sensing methods -- Debris-flow instrumentation -- Runout prediction methods -- Climatic factors influencing occurrence of debris flows -- Wildfire-related debris flow from a hazards perspective -- Influence of forest harvesting activities on debris avalanches and flows -- Debris-flow hazard analysis -- Debris-flow mitigation measures -- Debris avalanches and debris flows of the Campania Region (southern Italy) -- Debris flows of December 1999 in Venezuela -- Debris flows caused by Typhoon Herb in Taiwan -- Jiangjia Ravine debris flows in south-western China -- Debris flows and debris avalanches in Clayoquot Sound -- Analysis and management of debris-flow risks at Sörenberg (Switzerland) -- Engineering for debris flows in New Zealand -- Multifaceted hazard assessment of Cheekye fan, a large debris-flow fan in south-western British Columbia -- Debris flows at Mount St. Helens, Washington, USA.